// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//  
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
using System;

namespace SharpCifs.Smb
{
    internal class SmbComWrite : ServerMessageBlock
    {
        private int _fid;

        private int _count;

        private int _offset;

        private int _remaining;

        private int _off;

        private byte[] _b;

        public SmbComWrite()
        {
            Command = SmbComWrite;
        }

        internal SmbComWrite(int fid, int offset, int remaining, byte[] b, int off, int len)
        {
            this._fid = fid;
            _count = len;
            this._offset = offset;
            this._remaining = remaining;
            this._b = b;
            this._off = off;
            Command = SmbComWrite;
        }

        internal virtual void SetParam(int fid,
                                       long offset,
                                       int remaining,
                                       byte[] b,
                                       int off,
                                       int len)
        {
            this._fid = fid;
            this._offset = (int)(offset & unchecked(0xFFFFFFFFL));
            this._remaining = remaining;
            this._b = b;
            this._off = off;
            _count = len;
            Digest = null;
        }

        internal override int WriteParameterWordsWireFormat(byte[] dst, int dstIndex)
        {
            int start = dstIndex;
            WriteInt2(_fid, dst, dstIndex);
            dstIndex += 2;
            WriteInt2(_count, dst, dstIndex);
            dstIndex += 2;
            WriteInt4(_offset, dst, dstIndex);
            dstIndex += 4;
            WriteInt2(_remaining, dst, dstIndex);
            dstIndex += 2;
            return dstIndex - start;
        }

        internal override int WriteBytesWireFormat(byte[] dst, int dstIndex)
        {
            int start = dstIndex;
            dst[dstIndex++] = 0x01;
            WriteInt2(_count, dst, dstIndex);
            dstIndex += 2;
            Array.Copy(_b, _off, dst, dstIndex, _count);
            dstIndex += _count;
            return dstIndex - start;
        }

        internal override int ReadParameterWordsWireFormat(byte[] buffer, int bufferIndex)
        {
            return 0;
        }

        internal override int ReadBytesWireFormat(byte[] buffer, int bufferIndex)
        {
            return 0;
        }

        public override string ToString()
        {
            return "SmbComWrite["
                        + base.ToString()
                        + ",fid=" + _fid
                        + ",count=" + _count
                        + ",offset=" + _offset
                        + ",remaining=" + _remaining + "]";
        }
    }
}
